49k miles trans fluid exchange on a GM 10L80

[ctechbob]

I have more experience with the fords than GM but usually valve body problems arise from fine metal particles that contaminate the fluid and cause the valves to hang up. I can’t imagine it’s much different for GM. Metal can be from the torque converter, P3 planet and steel plates typically.

Exactly what I determined shortly after I bought my Ranger with the 10R80. I started fluid changes early and often. I do a spill and fill every other oil change.

 

[martinq]

doesn’t look horrible imho
49k miles on trans fluid, tow about 2k miles a year. 10L80 transmission....

Doesn't look horrible but I wouldn't want that in any of my trannys. How dirty are the pan and magnets?

 

[martinq]

Hopefully the filter was changed.

Cleaning the pan and magnets is far more important than the filter. Most of the metal wear particles will go right through the filter.